Rock County, Wisconsin

Geography According to the U.S. Census Bureau, the county has a total area of 1,881 km² (726 mi²). 1,866 km² (720 mi²) of it is land and 15 km² (6 mi²) of it is water. The total area is 0.79% water.

Demographics As of the census¹ of 2000, there are 152,307 people, 58,617 households, and 40,387 families residing in the county. The population density is 82/km² (211/mi²). There are 62,187 housing units at an average density of 33/km² (86/mi²). The racial makeup of the county is 91.01% White, 4.63% African American, 0.28% Native American, 0.78% Asian, 0.04% Pacific Islander, 1.77% from other races, and 1.50% from two or more races. 3.91% of the population are Hispanic or Latino of any race.

There are 58,617 households out of which 33.60% have children under the age of 18 living with them, 53.50% are married couples living together, 10.90% have a female householder with no husband present, and 31.10% are non-families. 25.10% of all households are made up of individuals and 9.70% have someone living alone who is 65 years of age or older. The average household size is 2.54 and the average family size is 3.03.

In the county, the population is spread out with 26.50% under the age of 18, 8.60% from 18 to 24, 29.80% from 25 to 44, 22.30% from 45 to 64, and 12.70% who are 65 years of age or older. The median age is 36 years. For every 100 females there are 97.00 males. For every 100 females age 18 and over, there are 94.10 males.

Cities and Towns

• Avon
• Beloit
• Bradford
• Center
• Clinton
• Evansville
• Footville
• Fulton
• Harmony
• Janesville[?]
• Johnstown
• La Prairie
• Lima
• Magnolia
• Milton[?]
• Newark
• Orfordville
• Plymouth
• Porter
• Rock
• Spring Valley
• Turtle
• Union